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<div class="header">
  <div class="headertitle"><div class="title">collisiondetector.cpp</div></div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">  Copyright (c) 2019-2022 Fabrizio Di Vittorio.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment">  All rights reserved.</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"></span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"></span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">* Please contact fdivitto2013@gmail.com if you need a commercial license.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"></span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">* This library and related software is available under GPL v3.</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"></span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment">  it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">  (at your option) any later version.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"></span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment">  GNU General Public License for more details.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment"></span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment">  You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment"> */</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span> </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span><span class="preprocessor">#include &lt;assert.h&gt;</span></div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="preprocessor">#include &quot;freertos/FreeRTOS.h&quot;</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="preprocessor">#include &quot;freertos/task.h&quot;</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span><span class="preprocessor">#include &quot;<a class="code" href="collisiondetector_8h.html">collisiondetector.h</a>&quot;</span></div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span><span class="preprocessor">#include &quot;<a class="code" href="fabutils_8h.html">fabutils.h</a>&quot;</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span> </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="preprocessor">#pragma GCC optimize (&quot;O2&quot;</span>)</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="keyword">namespace </span>fabgl {</div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span> </div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span> </div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span> </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="comment">// QuadTree implementation</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span> </div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span>QuadTree::QuadTree(CollisionDetector * collisionDetector, QuadTree * parent, QuadTreeQuadrant quadrant, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno">   53</span>{</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>  m_collisionDetector     = collisionDetector;</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>  m_parent                = parent;</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>  m_quadrant              = quadrant;</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>  m_x                     = x;</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>  m_y                     = y;</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>  m_width                 = <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>;</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>  m_height                = <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>;</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>  m_objects               = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>  m_objectsCount          = 0;</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>  m_children[TopLeft]     = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span>  m_children[TopRight]    = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span>  m_children[BottomLeft]  = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>  m_children[BottomRight] = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>}</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span> </div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span> </div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span><span class="keywordtype">bool</span> QuadTree::isEmpty()</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span>{</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno">   72</span>  <span class="keywordflow">return</span> m_objectsCount == 0 &amp;&amp;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>         m_children[TopLeft] == <span class="keyword">nullptr</span> &amp;&amp;</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>         m_children[TopRight] == <span class="keyword">nullptr</span> &amp;&amp;</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>         m_children[BottomLeft] == <span class="keyword">nullptr</span> &amp;&amp;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span>         m_children[BottomRight] == <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>}</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span> </div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span><span class="keywordtype">void</span> QuadTree::detachFromParent()</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>{</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span>  <span class="keywordflow">if</span> (m_parent) {</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>    m_parent-&gt;m_children[m_quadrant] = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>    m_parent = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span>  }</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>}</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span> </div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span> </div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span><span class="keywordtype">void</span> QuadTree::insert(QuadTreeObject * <span class="keywordtype">object</span>)</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>{</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span>  QuadTreeQuadrant quadrant = getQuadrant(<span class="keywordtype">object</span>);</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span>  <span class="keywordflow">if</span> (quadrant != None &amp;&amp; m_children[quadrant]) {</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span>    m_children[quadrant]-&gt;insert(<span class="keywordtype">object</span>);</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>  }</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span> </div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>  <span class="keywordtype">object</span>-&gt;owner = <span class="keyword">this</span>;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span>  <span class="keywordtype">object</span>-&gt;next = m_objects;</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span>  m_objects = object;</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>  ++m_objectsCount;</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span> </div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  <span class="keywordflow">if</span> (m_objectsCount &lt; QUADTREE_LEVEL_SPLIT_THRESHOLD)</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span>    <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  <span class="comment">// split m_objects inside sub trees (4 quadrants)</span></div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span> </div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>  QuadTreeObject * obj = m_objects;</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>  QuadTreeObject * prev = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  <span class="keywordflow">while</span> (obj) {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>    QuadTreeObject * next = obj-&gt;next;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span>    QuadTreeQuadrant quadrant = getQuadrant(obj);</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span>    <span class="keywordflow">if</span> (quadrant != None) {</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno">  113</span>      createQuadrant(quadrant);</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>      m_children[quadrant]-&gt;insert(obj);</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>      --m_objectsCount;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>      <span class="keywordflow">if</span> (prev == <span class="keyword">nullptr</span>)</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span>        m_objects = next;</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>      <span class="keywordflow">else</span></div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>        prev-&gt;next = next;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>    } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>      prev = obj;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>    }</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span>    obj = next;</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  }</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>}</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span> </div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span> </div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="keywordtype">void</span> QuadTree::remove(QuadTreeObject * <span class="keywordtype">object</span>)</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>{</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span>  <span class="comment">// rebuild the list removing this object</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>  QuadTreeObject * obj = <span class="keywordtype">object</span>-&gt;owner-&gt;m_objects;</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span>  QuadTreeObject * prev = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span>  <span class="keywordflow">while</span> (obj) {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>    <span class="keywordflow">if</span> (obj == <span class="keywordtype">object</span>) {</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>      <span class="keywordflow">if</span> (prev == <span class="keyword">nullptr</span>)</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span>        <span class="keywordtype">object</span>-&gt;owner-&gt;m_objects = <span class="keywordtype">object</span>-&gt;next;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>      <span class="keywordflow">else</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>        prev-&gt;next = <span class="keywordtype">object</span>-&gt;next;</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span>      <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span>    }</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno">  141</span>    prev = obj;</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>    obj = obj-&gt;next;</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  }</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>  <span class="keywordtype">object</span>-&gt;owner-&gt;m_objectsCount -= 1;</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span>  <span class="keywordtype">object</span>-&gt;owner = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>  <span class="keywordtype">object</span>-&gt;next  = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>}</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span> </div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span><span class="keywordtype">void</span> QuadTree::createQuadrant(QuadTreeQuadrant quadrant)</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span>{</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>  <span class="keywordflow">if</span> (m_children[quadrant] == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>    <span class="keywordtype">int</span> halfWidth  = m_width &gt;&gt; 1;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>    <span class="keywordtype">int</span> halfHeight = m_height &gt;&gt; 1;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span>    <span class="keywordflow">switch</span> (quadrant) {</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>      <span class="keywordflow">case</span> TopLeft:</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span>        m_children[TopLeft]     = m_collisionDetector-&gt;initEmptyQuadTree(<span class="keyword">this</span>, TopLeft,     m_x,             m_y,              halfWidth, halfHeight);</div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>      <span class="keywordflow">case</span> TopRight:</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span>        m_children[TopRight]    = m_collisionDetector-&gt;initEmptyQuadTree(<span class="keyword">this</span>, TopRight,    m_x + halfWidth, m_y,              halfWidth, halfHeight);</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>      <span class="keywordflow">case</span> BottomLeft:</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span>        m_children[BottomLeft]  = m_collisionDetector-&gt;initEmptyQuadTree(<span class="keyword">this</span>, BottomLeft,  m_x,             m_y + halfHeight, halfWidth, halfHeight);</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span>      <span class="keywordflow">case</span> BottomRight:</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span>        m_children[BottomRight] = m_collisionDetector-&gt;initEmptyQuadTree(<span class="keyword">this</span>, BottomRight, m_x + halfWidth, m_y + halfHeight, halfWidth, halfHeight);</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>      <span class="keywordflow">default</span>:</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>        <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>    }</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>  }</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span>}</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span> </div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span><span class="comment">// check if object is inside rect</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="keywordtype">bool</span> QuadTree::objectInRect(QuadTreeObject * <span class="keywordtype">object</span>, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span>{</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span>  <span class="keywordflow">return</span> (object-&gt;sprite-&gt;x &gt;= x) &amp;&amp;</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span>         (<span class="keywordtype">object</span>-&gt;sprite-&gt;y &gt;= y) &amp;&amp;</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>         (object-&gt;sprite-&gt;x + object-&gt;sprite-&gt;getWidth() &lt;= x + <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>) &amp;&amp;</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>         (object-&gt;sprite-&gt;y + object-&gt;sprite-&gt;getHeight() &lt;= y + <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>);</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span>}</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span> </div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span> </div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span>QuadTreeQuadrant QuadTree::getQuadrant(QuadTreeObject * <span class="keywordtype">object</span>)</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>{</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>  <span class="keywordtype">int</span> hWidth  = m_width &gt;&gt; 1;</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>  <span class="keywordtype">int</span> hHeight = m_height &gt;&gt; 1;</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span>  <span class="keywordflow">if</span> (objectInRect(<span class="keywordtype">object</span>, m_x,          m_y,           hWidth, hHeight))</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>    <span class="keywordflow">return</span> TopLeft;</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>  <span class="keywordflow">if</span> (objectInRect(<span class="keywordtype">object</span>, m_x + hWidth, m_y,           hWidth, hHeight))</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>    <span class="keywordflow">return</span> TopRight;</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span>  <span class="keywordflow">if</span> (objectInRect(<span class="keywordtype">object</span>, m_x,          m_y + hHeight, hWidth, hHeight))</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>    <span class="keywordflow">return</span> BottomLeft;</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>  <span class="keywordflow">if</span> (objectInRect(<span class="keywordtype">object</span>, m_x + hWidth, m_y + hHeight, hWidth, hHeight))</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>    <span class="keywordflow">return</span> BottomRight;</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>  <span class="keywordflow">return</span> None;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>}</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span> </div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span> </div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span><span class="keywordtype">void</span> QuadTree::update(QuadTreeObject * <span class="keywordtype">object</span>)</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span>{</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>  QuadTree * qtree = <span class="keywordtype">object</span>-&gt;owner;</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span>    <span class="keywordflow">if</span> (qtree-&gt;m_parent == <span class="keyword">nullptr</span> || objectInRect(<span class="keywordtype">object</span>, qtree-&gt;m_x, qtree-&gt;m_y, qtree-&gt;m_width, qtree-&gt;m_height)) {</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>      <span class="comment">// need to reinsert?</span></div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span>      QuadTreeQuadrant quadrant = qtree-&gt;getQuadrant(<span class="keywordtype">object</span>);</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>      <span class="keywordflow">if</span> (qtree == object-&gt;owner &amp;&amp; qtree-&gt;m_children[quadrant] == <span class="keyword">nullptr</span>)</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>        <span class="keywordflow">return</span>; <span class="comment">// don&#39;t need to reinsert</span></div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span> </div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>      <span class="comment">// need to be reinserted, remove from owner...</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>      remove(<span class="keywordtype">object</span>);</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span> </div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>      <span class="comment">// ...and reinsert in qtree node</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>      qtree-&gt;insert(<span class="keywordtype">object</span>);</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span>      <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>    }</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>    qtree = qtree-&gt;m_parent;</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>  }</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>}</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span> </div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span> </div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span><span class="comment">// get the first detected collision</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span><span class="comment">// ret nullptr = no collision detected</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>QuadTreeObject * QuadTree::detectCollision(QuadTreeObject * <span class="keywordtype">object</span>, CollisionDetectionCallback callbackFunc, <span class="keywordtype">void</span> * callbackObj)</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>{</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>  <span class="keywordflow">if</span> (!object-&gt;sprite-&gt;visible)</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span>    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span> </div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>  <span class="comment">// find rectangle level collision with objects of this level</span></div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>  QuadTreeObject * obj = m_objects;</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>  <span class="keywordflow">while</span> (obj) {</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span>    QuadTreeObject * next = obj-&gt;next;  <span class="comment">// this allows object to be removed if collision is detected</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span>    <span class="comment">// check intersection and masks collision</span></div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>    Point collisionPoint;</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span>    <span class="keywordflow">if</span> (<span class="keywordtype">object</span> != obj &amp;&amp; obj-&gt;sprite-&gt;visible &amp;&amp; objectsIntersect(<span class="keywordtype">object</span>, obj) &amp;&amp; checkMaskCollision(<span class="keywordtype">object</span>, obj, &amp;collisionPoint)) {</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>      <span class="comment">// collision!</span></div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span>      <span class="keywordflow">if</span> (callbackFunc)</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span>        callbackFunc(callbackObj, object-&gt;sprite, obj-&gt;sprite, collisionPoint); <span class="comment">// call function and continue</span></div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span>      <span class="keywordflow">else</span></div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>        <span class="keywordflow">return</span> obj; <span class="comment">// return first detected object and stop</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span>    }</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span>    obj = next;</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span>  }</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno">  245</span> </div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno">  246</span>  <span class="comment">// check in children</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno">  247</span>  QuadTreeQuadrant quadrant = getQuadrant(<span class="keywordtype">object</span>);</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno">  248</span>  <span class="keywordflow">if</span> (quadrant != None) {</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno">  249</span>    <span class="comment">// look in a specific quadrant</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno">  250</span>    <span class="keywordflow">if</span> (m_children[quadrant])</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno">  251</span>      <span class="keywordflow">return</span> m_children[quadrant]-&gt;detectCollision(<span class="keywordtype">object</span>, callbackFunc, callbackObj);</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno">  252</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno">  253</span>    <span class="comment">// look in all quadrants</span></div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno">  254</span>    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; 4; ++i) {</div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno">  255</span>      QuadTreeObject * obj = m_children[i] &amp;&amp; objectIntersectsQuadTree(<span class="keywordtype">object</span>, m_children[i]) ? m_children[i]-&gt;detectCollision(<span class="keywordtype">object</span>, callbackFunc, callbackObj) : <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno">  256</span>      <span class="keywordflow">if</span> (obj &amp;&amp; !callbackFunc)</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno">  257</span>        <span class="keywordflow">return</span> obj;</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno">  258</span>    }</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno">  259</span>  }</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno">  260</span> </div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno">  261</span>  <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno">  262</span>}</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno">  263</span> </div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno">  264</span> </div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno">  265</span><span class="keywordtype">bool</span> QuadTree::objectsIntersect(QuadTreeObject * objectA, QuadTreeObject * objectB)</div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno">  266</span>{</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno">  267</span>  <span class="keywordflow">return</span> objectA-&gt;sprite-&gt;x + objectA-&gt;sprite-&gt;getWidth()  &gt;= objectB-&gt;sprite-&gt;x &amp;&amp;</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno">  268</span>         objectB-&gt;sprite-&gt;x + objectB-&gt;sprite-&gt;getWidth()  &gt;= objectA-&gt;sprite-&gt;x &amp;&amp;</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno">  269</span>         objectA-&gt;sprite-&gt;y + objectA-&gt;sprite-&gt;getHeight() &gt;= objectB-&gt;sprite-&gt;y &amp;&amp;</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno">  270</span>         objectB-&gt;sprite-&gt;y + objectB-&gt;sprite-&gt;getHeight() &gt;= objectA-&gt;sprite-&gt;y;</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno">  271</span>}</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno">  272</span> </div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno">  273</span> </div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno">  274</span> </div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno">  275</span><span class="keywordtype">bool</span> QuadTree::objectIntersectsQuadTree(QuadTreeObject * <span class="keywordtype">object</span>, QuadTree * quadTree)</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno">  276</span>{</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno">  277</span>  <span class="keywordflow">return</span> <span class="keywordtype">object</span>-&gt;sprite-&gt;x + <span class="keywordtype">object</span>-&gt;sprite-&gt;getWidth()  &gt;= quadTree-&gt;m_x     &amp;&amp;</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno">  278</span>         quadTree-&gt;m_x     + quadTree-&gt;m_width           &gt;= <span class="keywordtype">object</span>-&gt;sprite-&gt;x &amp;&amp;</div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno">  279</span>         <span class="keywordtype">object</span>-&gt;sprite-&gt;y + <span class="keywordtype">object</span>-&gt;sprite-&gt;getHeight() &gt;= quadTree-&gt;m_y     &amp;&amp;</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno">  280</span>         quadTree-&gt;m_y     + quadTree-&gt;m_height          &gt;= <span class="keywordtype">object</span>-&gt;sprite-&gt;y;</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno">  281</span>}</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno">  282</span> </div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno">  283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno">  284</span><span class="keywordtype">bool</span> QuadTree::checkMaskCollision(QuadTreeObject * objectA, QuadTreeObject * objectB, Point * collisionPoint)</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno">  285</span>{</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno">  286</span>  <span class="comment">// intersection rectangle</span></div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno">  287</span>  <span class="keywordtype">int</span> x1 = tmax(objectA-&gt;sprite-&gt;x, objectB-&gt;sprite-&gt;x);</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno">  288</span>  <span class="keywordtype">int</span> y1 = tmax(objectA-&gt;sprite-&gt;y, objectB-&gt;sprite-&gt;y);</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno">  289</span>  <span class="keywordtype">int</span> x2 = tmin(objectA-&gt;sprite-&gt;x + objectA-&gt;sprite-&gt;getWidth() - 1, objectB-&gt;sprite-&gt;x + objectB-&gt;sprite-&gt;getWidth() - 1);</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno">  290</span>  <span class="keywordtype">int</span> y2 = tmin(objectA-&gt;sprite-&gt;y + objectA-&gt;sprite-&gt;getHeight() - 1, objectB-&gt;sprite-&gt;y + objectB-&gt;sprite-&gt;getHeight() - 1);</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno">  291</span> </div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno">  292</span>  <span class="comment">// look for matching non trasparent pixels inside the intersection area</span></div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno">  293</span>  Bitmap * bitmapA = objectA-&gt;sprite-&gt;getFrame();</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno">  294</span>  Bitmap * bitmapB = objectB-&gt;sprite-&gt;getFrame();</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno">  295</span>  <span class="keywordflow">if</span> (bitmapA-&gt;format == <a class="code hl_enumvalue" href="group___enumerations_gafe919d7a7aeba256337f0fc494cf7221.html#ggafe919d7a7aeba256337f0fc494cf7221ab24d28cf12130dc2957866674bc65ff7">PixelFormat::RGBA2222</a> &amp;&amp; bitmapB-&gt;format == <a class="code hl_enumvalue" href="group___enumerations_gafe919d7a7aeba256337f0fc494cf7221.html#ggafe919d7a7aeba256337f0fc494cf7221ab24d28cf12130dc2957866674bc65ff7">PixelFormat::RGBA2222</a>) {</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno">  296</span>    <span class="comment">// bitmaps have same pixel format, quick compare</span></div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno">  297</span>    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = y1; y &lt;= y2; ++y) {</div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno">  298</span>      uint8_t <span class="keyword">const</span> * rowA = bitmapA-&gt;data + bitmapA-&gt;width * (y - objectA-&gt;sprite-&gt;y);</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno">  299</span>      uint8_t <span class="keyword">const</span> * rowB = bitmapB-&gt;data + bitmapB-&gt;width * (y - objectB-&gt;sprite-&gt;y);</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno">  300</span>      <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = x1; x &lt;= x2; ++x) {</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno">  301</span>        <span class="keywordtype">int</span> alphaA = rowA[x - objectA-&gt;sprite-&gt;x] &gt;&gt; 6;</div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno">  302</span>        <span class="keywordtype">int</span> alphaB = rowB[x - objectB-&gt;sprite-&gt;x] &gt;&gt; 6;</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno">  303</span>        <span class="keywordflow">if</span> (alphaA &amp;&amp; alphaB) {</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno">  304</span>          *collisionPoint = (Point){(int16_t)x, (int16_t)y};</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno">  305</span>          <span class="keywordflow">return</span> <span class="keyword">true</span>;  <span class="comment">// collision</span></div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno">  306</span>        }</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno">  307</span>      }</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno">  308</span>    }</div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno">  309</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno">  310</span>    <span class="comment">// different pixel formats, slow compare</span></div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno">  311</span>    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> y = y1; y &lt;= y2; ++y) {</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno">  312</span>      <span class="keywordflow">for</span> (<span class="keywordtype">int</span> x = x1; x &lt;= x2; ++x) {</div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno">  313</span>        <span class="keywordtype">int</span> alphaA = bitmapA-&gt;getAlpha(x - objectA-&gt;sprite-&gt;x, y - objectA-&gt;sprite-&gt;y);</div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno">  314</span>        <span class="keywordtype">int</span> alphaB = bitmapB-&gt;getAlpha(x - objectB-&gt;sprite-&gt;x, y - objectB-&gt;sprite-&gt;y);</div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno">  315</span>        <span class="keywordflow">if</span> (alphaA &amp;&amp; alphaB) {</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno">  316</span>          *collisionPoint = (Point){(int16_t)x, (int16_t)y};</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno">  317</span>          <span class="keywordflow">return</span> <span class="keyword">true</span>;  <span class="comment">// collision</span></div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno">  318</span>        }</div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno">  319</span>      }</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno">  320</span>    }</div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno">  321</span>  }</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno">  322</span> </div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno">  323</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno">  324</span>}</div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno">  325</span> </div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno">  326</span> </div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno">  327</span><span class="comment">/*</span></div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno">  328</span><span class="comment">void QuadTree::dump(int level)</span></div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno">  329</span><span class="comment">{</span></div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno">  330</span><span class="comment">  printf(&quot;%*sLevel %d x:%d y:%d w:%d h:%d\n&quot;, level, &quot;&quot;, level, m_x, m_y, m_width, m_height);</span></div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno">  331</span><span class="comment">  printf(&quot;%*sObjects: &quot;, level, &quot;&quot;);</span></div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno">  332</span><span class="comment">  QuadTreeObject * obj = m_objects;</span></div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno">  333</span><span class="comment">  while (obj) {</span></div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno">  334</span><span class="comment">    printf(&quot;[%p x:%d y:%d w:%d h:%d] &quot;, obj, obj-&gt;sprite-&gt;x, obj-&gt;sprite-&gt;y, obj-&gt;sprite-&gt;getWidth(), obj-&gt;sprite-&gt;getHeight());</span></div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno">  335</span><span class="comment">    obj = obj-&gt;next;</span></div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno">  336</span><span class="comment">  }</span></div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno">  337</span><span class="comment">  printf(&quot;\n&quot;);</span></div>
<div class="line"><a id="l00338" name="l00338"></a><span class="lineno">  338</span><span class="comment">  printf(&quot;%*sChildren:\n&quot;, level, &quot;&quot;);</span></div>
<div class="line"><a id="l00339" name="l00339"></a><span class="lineno">  339</span><span class="comment">  for (int i = TopLeft; i &lt;= BottomRight; ++i)</span></div>
<div class="line"><a id="l00340" name="l00340"></a><span class="lineno">  340</span><span class="comment">    if (m_children[i])</span></div>
<div class="line"><a id="l00341" name="l00341"></a><span class="lineno">  341</span><span class="comment">      m_children[i]-&gt;dump(level + 1);</span></div>
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno">  342</span><span class="comment">}</span></div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno">  343</span><span class="comment">*/</span></div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno">  344</span> </div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno">  345</span> </div>
<div class="line"><a id="l00348" name="l00348"></a><span class="lineno">  348</span><span class="comment">// CollisionDetector implementation</span></div>
<div class="line"><a id="l00349" name="l00349"></a><span class="lineno">  349</span> </div>
<div class="line"><a id="l00350" name="l00350"></a><span class="lineno">  350</span> </div>
<div class="line"><a id="l00351" name="l00351"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_aadae4076ddcd85581efac286bb8d799c.html#aadae4076ddcd85581efac286bb8d799c">  351</a></span><a class="code hl_function" href="classfabgl_1_1_collision_detector_aadae4076ddcd85581efac286bb8d799c.html#aadae4076ddcd85581efac286bb8d799c">CollisionDetector::CollisionDetector</a>(<span class="keywordtype">int</span> maxObjectsCount, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</div>
<div class="line"><a id="l00352" name="l00352"></a><span class="lineno">  352</span>  : m_quadTreePool(nullptr), m_objectPool(nullptr)</div>
<div class="line"><a id="l00353" name="l00353"></a><span class="lineno">  353</span>{</div>
<div class="line"><a id="l00354" name="l00354"></a><span class="lineno">  354</span>  m_objectPoolSize = maxObjectsCount;</div>
<div class="line"><a id="l00355" name="l00355"></a><span class="lineno">  355</span>  m_quadTreePoolSize = (5 * maxObjectsCount + 1) / 3;</div>
<div class="line"><a id="l00356" name="l00356"></a><span class="lineno">  356</span> </div>
<div class="line"><a id="l00357" name="l00357"></a><span class="lineno">  357</span>  <span class="keywordflow">if</span> (maxObjectsCount &gt; 0) {</div>
<div class="line"><a id="l00358" name="l00358"></a><span class="lineno">  358</span> </div>
<div class="line"><a id="l00359" name="l00359"></a><span class="lineno">  359</span>    <span class="comment">// preallocate and initialize quad trees</span></div>
<div class="line"><a id="l00360" name="l00360"></a><span class="lineno">  360</span>    m_quadTreePool = (QuadTree*) malloc(<span class="keyword">sizeof</span>(QuadTree) * m_quadTreePoolSize);</div>
<div class="line"><a id="l00361" name="l00361"></a><span class="lineno">  361</span> </div>
<div class="line"><a id="l00362" name="l00362"></a><span class="lineno">  362</span>    <span class="comment">// initialize root quadtree</span></div>
<div class="line"><a id="l00363" name="l00363"></a><span class="lineno">  363</span>    m_quadTreePool[0] = QuadTree(<span class="keyword">this</span>, <span class="keyword">nullptr</span>, None, 0, 0, <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>);</div>
<div class="line"><a id="l00364" name="l00364"></a><span class="lineno">  364</span>    m_rootQuadTree = m_quadTreePool;</div>
<div class="line"><a id="l00365" name="l00365"></a><span class="lineno">  365</span> </div>
<div class="line"><a id="l00366" name="l00366"></a><span class="lineno">  366</span>    <span class="comment">// initialize other quadtrees</span></div>
<div class="line"><a id="l00367" name="l00367"></a><span class="lineno">  367</span>    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; m_quadTreePoolSize; ++i)</div>
<div class="line"><a id="l00368" name="l00368"></a><span class="lineno">  368</span>      m_quadTreePool[i] = QuadTree(<span class="keyword">this</span>, <span class="keyword">nullptr</span>, None, 0, 0, 0, 0);</div>
<div class="line"><a id="l00369" name="l00369"></a><span class="lineno">  369</span> </div>
<div class="line"><a id="l00370" name="l00370"></a><span class="lineno">  370</span>    <span class="comment">// preallocate and initialize objects</span></div>
<div class="line"><a id="l00371" name="l00371"></a><span class="lineno">  371</span>    m_objectPool = (QuadTreeObject*) malloc(<span class="keyword">sizeof</span>(QuadTreeObject) * m_objectPoolSize);</div>
<div class="line"><a id="l00372" name="l00372"></a><span class="lineno">  372</span>    <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m_objectPoolSize; ++i)</div>
<div class="line"><a id="l00373" name="l00373"></a><span class="lineno">  373</span>      m_objectPool[i] = QuadTreeObject(<span class="keyword">nullptr</span>, <span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00374" name="l00374"></a><span class="lineno">  374</span> </div>
<div class="line"><a id="l00375" name="l00375"></a><span class="lineno">  375</span>  }</div>
<div class="line"><a id="l00376" name="l00376"></a><span class="lineno">  376</span>}</div>
<div class="line"><a id="l00377" name="l00377"></a><span class="lineno">  377</span> </div>
<div class="line"><a id="l00378" name="l00378"></a><span class="lineno">  378</span> </div>
<div class="line"><a id="l00379" name="l00379"></a><span class="lineno">  379</span>CollisionDetector::~CollisionDetector()</div>
<div class="line"><a id="l00380" name="l00380"></a><span class="lineno">  380</span>{</div>
<div class="line"><a id="l00381" name="l00381"></a><span class="lineno">  381</span>  free(m_quadTreePool);</div>
<div class="line"><a id="l00382" name="l00382"></a><span class="lineno">  382</span>  free(m_objectPool);</div>
<div class="line"><a id="l00383" name="l00383"></a><span class="lineno">  383</span>}</div>
<div class="line"><a id="l00384" name="l00384"></a><span class="lineno">  384</span> </div>
<div class="line"><a id="l00385" name="l00385"></a><span class="lineno">  385</span> </div>
<div class="line"><a id="l00386" name="l00386"></a><span class="lineno">  386</span>QuadTree * CollisionDetector::initEmptyQuadTree(QuadTree * parent, QuadTreeQuadrant quadrant, <span class="keywordtype">int</span> x, <span class="keywordtype">int</span> y, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <span class="keywordtype">int</span> <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>)</div>
<div class="line"><a id="l00387" name="l00387"></a><span class="lineno">  387</span>{</div>
<div class="line"><a id="l00388" name="l00388"></a><span class="lineno">  388</span>  <span class="comment">// look for a unused quadtree inside the pool</span></div>
<div class="line"><a id="l00389" name="l00389"></a><span class="lineno">  389</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1; i &lt; m_quadTreePoolSize; ++i) {</div>
<div class="line"><a id="l00390" name="l00390"></a><span class="lineno">  390</span>    <span class="keywordflow">if</span> (m_quadTreePool[i].isEmpty()) {</div>
<div class="line"><a id="l00391" name="l00391"></a><span class="lineno">  391</span>      m_quadTreePool[i].detachFromParent();</div>
<div class="line"><a id="l00392" name="l00392"></a><span class="lineno">  392</span>      m_quadTreePool[i] = QuadTree(<span class="keyword">this</span>, parent, quadrant, x, y, <a class="code hl_variable" href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a>, <a class="code hl_variable" href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a>);</div>
<div class="line"><a id="l00393" name="l00393"></a><span class="lineno">  393</span>      <span class="keywordflow">return</span> &amp;m_quadTreePool[i];</div>
<div class="line"><a id="l00394" name="l00394"></a><span class="lineno">  394</span>    }</div>
<div class="line"><a id="l00395" name="l00395"></a><span class="lineno">  395</span>  }</div>
<div class="line"><a id="l00396" name="l00396"></a><span class="lineno">  396</span>  assert(<span class="keyword">false</span> &amp;&amp; <span class="stringliteral">&quot;No enough quadtrees&quot;</span>);  <span class="comment">// should never happen</span></div>
<div class="line"><a id="l00397" name="l00397"></a><span class="lineno">  397</span>}</div>
<div class="line"><a id="l00398" name="l00398"></a><span class="lineno">  398</span> </div>
<div class="line"><a id="l00399" name="l00399"></a><span class="lineno">  399</span> </div>
<div class="line"><a id="l00400" name="l00400"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_a48b03f63e22824a043e5df322ecebd3c.html#a48b03f63e22824a043e5df322ecebd3c">  400</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classfabgl_1_1_collision_detector_a48b03f63e22824a043e5df322ecebd3c.html#a48b03f63e22824a043e5df322ecebd3c">CollisionDetector::addSprite</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite)</div>
<div class="line"><a id="l00401" name="l00401"></a><span class="lineno">  401</span>{</div>
<div class="line"><a id="l00402" name="l00402"></a><span class="lineno">  402</span>  <span class="comment">// look for unused object inside the pool</span></div>
<div class="line"><a id="l00403" name="l00403"></a><span class="lineno">  403</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; m_objectPoolSize; ++i)</div>
<div class="line"><a id="l00404" name="l00404"></a><span class="lineno">  404</span>    <span class="keywordflow">if</span> (m_objectPool[i].sprite == <span class="keyword">nullptr</span>) {</div>
<div class="line"><a id="l00405" name="l00405"></a><span class="lineno">  405</span>      QuadTreeObject * obj = &amp;m_objectPool[i];</div>
<div class="line"><a id="l00406" name="l00406"></a><span class="lineno">  406</span>      obj-&gt;sprite = sprite;</div>
<div class="line"><a id="l00407" name="l00407"></a><span class="lineno">  407</span>      sprite-&gt;collisionDetectorObject = obj;</div>
<div class="line"><a id="l00408" name="l00408"></a><span class="lineno">  408</span>      m_rootQuadTree-&gt;insert(obj);</div>
<div class="line"><a id="l00409" name="l00409"></a><span class="lineno">  409</span>      <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00410" name="l00410"></a><span class="lineno">  410</span>    }</div>
<div class="line"><a id="l00411" name="l00411"></a><span class="lineno">  411</span>  assert(<span class="keyword">false</span> &amp;&amp; <span class="stringliteral">&quot;No enough objects&quot;</span>); <span class="comment">// should never happen</span></div>
<div class="line"><a id="l00412" name="l00412"></a><span class="lineno">  412</span>}</div>
<div class="line"><a id="l00413" name="l00413"></a><span class="lineno">  413</span> </div>
<div class="line"><a id="l00414" name="l00414"></a><span class="lineno">  414</span> </div>
<div class="line"><a id="l00415" name="l00415"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_aefc081299e5e20cd9b6d900de8559248.html#aefc081299e5e20cd9b6d900de8559248">  415</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classfabgl_1_1_collision_detector_aefc081299e5e20cd9b6d900de8559248.html#aefc081299e5e20cd9b6d900de8559248">CollisionDetector::removeSprite</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite)</div>
<div class="line"><a id="l00416" name="l00416"></a><span class="lineno">  416</span>{</div>
<div class="line"><a id="l00417" name="l00417"></a><span class="lineno">  417</span>  QuadTree::remove(sprite-&gt;collisionDetectorObject);</div>
<div class="line"><a id="l00418" name="l00418"></a><span class="lineno">  418</span>  sprite-&gt;collisionDetectorObject-&gt;sprite = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00419" name="l00419"></a><span class="lineno">  419</span>}</div>
<div class="line"><a id="l00420" name="l00420"></a><span class="lineno">  420</span> </div>
<div class="line"><a id="l00421" name="l00421"></a><span class="lineno">  421</span> </div>
<div class="line"><a id="l00422" name="l00422"></a><span class="lineno">  422</span><span class="comment">/*</span></div>
<div class="line"><a id="l00423" name="l00423"></a><span class="lineno">  423</span><span class="comment">void CollisionDetector::dump()</span></div>
<div class="line"><a id="l00424" name="l00424"></a><span class="lineno">  424</span><span class="comment">{</span></div>
<div class="line"><a id="l00425" name="l00425"></a><span class="lineno">  425</span><span class="comment">  m_rootQuadTree-&gt;dump();</span></div>
<div class="line"><a id="l00426" name="l00426"></a><span class="lineno">  426</span><span class="comment">}</span></div>
<div class="line"><a id="l00427" name="l00427"></a><span class="lineno">  427</span><span class="comment">*/</span></div>
<div class="line"><a id="l00428" name="l00428"></a><span class="lineno">  428</span> </div>
<div class="line"><a id="l00429" name="l00429"></a><span class="lineno">  429</span> </div>
<div class="line"><a id="l00430" name="l00430"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd.html#af49934327173c9c132ad03a49cbe88dd">  430</a></span><a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * <a class="code hl_function" href="classfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd.html#af49934327173c9c132ad03a49cbe88dd">CollisionDetector::detectCollision</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite, <span class="keywordtype">bool</span> removeCollidingSprites)</div>
<div class="line"><a id="l00431" name="l00431"></a><span class="lineno">  431</span>{</div>
<div class="line"><a id="l00432" name="l00432"></a><span class="lineno">  432</span>  QuadTreeObject * obj = m_rootQuadTree-&gt;detectCollision(sprite-&gt;collisionDetectorObject);</div>
<div class="line"><a id="l00433" name="l00433"></a><span class="lineno">  433</span>  <span class="keywordflow">if</span> (obj) {</div>
<div class="line"><a id="l00434" name="l00434"></a><span class="lineno">  434</span>    <a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * cSprite = obj-&gt;sprite;</div>
<div class="line"><a id="l00435" name="l00435"></a><span class="lineno">  435</span>    <a class="code hl_function" href="classfabgl_1_1_collision_detector_aefc081299e5e20cd9b6d900de8559248.html#aefc081299e5e20cd9b6d900de8559248">removeSprite</a>(sprite);</div>
<div class="line"><a id="l00436" name="l00436"></a><span class="lineno">  436</span>    <a class="code hl_function" href="classfabgl_1_1_collision_detector_aefc081299e5e20cd9b6d900de8559248.html#aefc081299e5e20cd9b6d900de8559248">removeSprite</a>(cSprite);</div>
<div class="line"><a id="l00437" name="l00437"></a><span class="lineno">  437</span>    <span class="keywordflow">return</span> cSprite;</div>
<div class="line"><a id="l00438" name="l00438"></a><span class="lineno">  438</span>  } <span class="keywordflow">else</span></div>
<div class="line"><a id="l00439" name="l00439"></a><span class="lineno">  439</span>    <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00440" name="l00440"></a><span class="lineno">  440</span>}</div>
<div class="line"><a id="l00441" name="l00441"></a><span class="lineno">  441</span> </div>
<div class="line"><a id="l00442" name="l00442"></a><span class="lineno">  442</span> </div>
<div class="line"><a id="l00443" name="l00443"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_a9a5ba3dccacba4da74daf832bca16dbc.html#a9a5ba3dccacba4da74daf832bca16dbc">  443</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd.html#af49934327173c9c132ad03a49cbe88dd">CollisionDetector::detectCollision</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite, CollisionDetectionCallback callbackFunc, <span class="keywordtype">void</span> * callbackObj)</div>
<div class="line"><a id="l00444" name="l00444"></a><span class="lineno">  444</span>{</div>
<div class="line"><a id="l00445" name="l00445"></a><span class="lineno">  445</span>  m_rootQuadTree-&gt;detectCollision(sprite-&gt;collisionDetectorObject, callbackFunc, callbackObj);</div>
<div class="line"><a id="l00446" name="l00446"></a><span class="lineno">  446</span>}</div>
<div class="line"><a id="l00447" name="l00447"></a><span class="lineno">  447</span> </div>
<div class="line"><a id="l00448" name="l00448"></a><span class="lineno">  448</span> </div>
<div class="line"><a id="l00449" name="l00449"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_ad5da37881b02299b991afee3cd96bf57.html#ad5da37881b02299b991afee3cd96bf57">  449</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classfabgl_1_1_collision_detector_ad5da37881b02299b991afee3cd96bf57.html#ad5da37881b02299b991afee3cd96bf57">CollisionDetector::update</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite)</div>
<div class="line"><a id="l00450" name="l00450"></a><span class="lineno">  450</span>{</div>
<div class="line"><a id="l00451" name="l00451"></a><span class="lineno">  451</span>  m_rootQuadTree-&gt;update(sprite-&gt;collisionDetectorObject);</div>
<div class="line"><a id="l00452" name="l00452"></a><span class="lineno">  452</span>}</div>
<div class="line"><a id="l00453" name="l00453"></a><span class="lineno">  453</span> </div>
<div class="line"><a id="l00454" name="l00454"></a><span class="lineno">  454</span> </div>
<div class="line"><a id="l00455" name="l00455"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_ae98903a2c36b115ac076b56fa3a64416.html#ae98903a2c36b115ac076b56fa3a64416">  455</a></span><a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * <a class="code hl_function" href="classfabgl_1_1_collision_detector_ae98903a2c36b115ac076b56fa3a64416.html#ae98903a2c36b115ac076b56fa3a64416">CollisionDetector::updateAndDetectCollision</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite, <span class="keywordtype">bool</span> removeCollidingSprites)</div>
<div class="line"><a id="l00456" name="l00456"></a><span class="lineno">  456</span>{</div>
<div class="line"><a id="l00457" name="l00457"></a><span class="lineno">  457</span>  <a class="code hl_function" href="classfabgl_1_1_collision_detector_ad5da37881b02299b991afee3cd96bf57.html#ad5da37881b02299b991afee3cd96bf57">update</a>(sprite);</div>
<div class="line"><a id="l00458" name="l00458"></a><span class="lineno">  458</span>  <span class="keywordflow">return</span> <a class="code hl_function" href="classfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd.html#af49934327173c9c132ad03a49cbe88dd">detectCollision</a>(sprite, removeCollidingSprites);</div>
<div class="line"><a id="l00459" name="l00459"></a><span class="lineno">  459</span>}</div>
<div class="line"><a id="l00460" name="l00460"></a><span class="lineno">  460</span> </div>
<div class="line"><a id="l00461" name="l00461"></a><span class="lineno">  461</span> </div>
<div class="line"><a id="l00462" name="l00462"></a><span class="lineno"><a class="line" href="classfabgl_1_1_collision_detector_af7b33b616a340e85f56563d6bf38b895.html#af7b33b616a340e85f56563d6bf38b895">  462</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="classfabgl_1_1_collision_detector_ae98903a2c36b115ac076b56fa3a64416.html#ae98903a2c36b115ac076b56fa3a64416">CollisionDetector::updateAndDetectCollision</a>(<a class="code hl_struct" href="structfabgl_1_1_sprite.html">Sprite</a> * sprite, CollisionDetectionCallback callbackFunc, <span class="keywordtype">void</span> * callbackObj)</div>
<div class="line"><a id="l00463" name="l00463"></a><span class="lineno">  463</span>{</div>
<div class="line"><a id="l00464" name="l00464"></a><span class="lineno">  464</span>  <a class="code hl_function" href="classfabgl_1_1_collision_detector_ad5da37881b02299b991afee3cd96bf57.html#ad5da37881b02299b991afee3cd96bf57">update</a>(sprite);</div>
<div class="line"><a id="l00465" name="l00465"></a><span class="lineno">  465</span>  <a class="code hl_function" href="classfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd.html#af49934327173c9c132ad03a49cbe88dd">detectCollision</a>(sprite, callbackFunc, callbackObj);</div>
<div class="line"><a id="l00466" name="l00466"></a><span class="lineno">  466</span>}</div>
<div class="line"><a id="l00467" name="l00467"></a><span class="lineno">  467</span> </div>
<div class="line"><a id="l00468" name="l00468"></a><span class="lineno">  468</span> </div>
<div class="line"><a id="l00469" name="l00469"></a><span class="lineno">  469</span> </div>
<div class="line"><a id="l00470" name="l00470"></a><span class="lineno">  470</span> </div>
<div class="line"><a id="l00471" name="l00471"></a><span class="lineno">  471</span>} <span class="comment">// end of namespace</span></div>
<div class="ttc" id="aclassfabgl_1_1_collision_detector_a48b03f63e22824a043e5df322ecebd3c_html_a48b03f63e22824a043e5df322ecebd3c"><div class="ttname"><a href="classfabgl_1_1_collision_detector_a48b03f63e22824a043e5df322ecebd3c.html#a48b03f63e22824a043e5df322ecebd3c">fabgl::CollisionDetector::addSprite</a></div><div class="ttdeci">void addSprite(Sprite *sprite)</div><div class="ttdoc">Adds the specified sprite to collision detector.</div><div class="ttdef"><b>Definition:</b> <a href="collisiondetector_8cpp_source.html#l00400">collisiondetector.cpp:400</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_collision_detector_aadae4076ddcd85581efac286bb8d799c_html_aadae4076ddcd85581efac286bb8d799c"><div class="ttname"><a href="classfabgl_1_1_collision_detector_aadae4076ddcd85581efac286bb8d799c.html#aadae4076ddcd85581efac286bb8d799c">fabgl::CollisionDetector::CollisionDetector</a></div><div class="ttdeci">CollisionDetector(int maxObjectsCount, int width, int height)</div><div class="ttdoc">Creates an instance of CollisionDetector.</div><div class="ttdef"><b>Definition:</b> <a href="collisiondetector_8cpp_source.html#l00351">collisiondetector.cpp:351</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_collision_detector_ad5da37881b02299b991afee3cd96bf57_html_ad5da37881b02299b991afee3cd96bf57"><div class="ttname"><a href="classfabgl_1_1_collision_detector_ad5da37881b02299b991afee3cd96bf57.html#ad5da37881b02299b991afee3cd96bf57">fabgl::CollisionDetector::update</a></div><div class="ttdeci">void update(Sprite *sprite)</div><div class="ttdoc">Updates collision detector.</div><div class="ttdef"><b>Definition:</b> <a href="collisiondetector_8cpp_source.html#l00449">collisiondetector.cpp:449</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_collision_detector_ae98903a2c36b115ac076b56fa3a64416_html_ae98903a2c36b115ac076b56fa3a64416"><div class="ttname"><a href="classfabgl_1_1_collision_detector_ae98903a2c36b115ac076b56fa3a64416.html#ae98903a2c36b115ac076b56fa3a64416">fabgl::CollisionDetector::updateAndDetectCollision</a></div><div class="ttdeci">Sprite * updateAndDetectCollision(Sprite *sprite, bool removeCollidingSprites=true)</div><div class="ttdoc">Updates collision detector and detect collision with the specified sprite.</div><div class="ttdef"><b>Definition:</b> <a href="collisiondetector_8cpp_source.html#l00455">collisiondetector.cpp:455</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_collision_detector_aefc081299e5e20cd9b6d900de8559248_html_aefc081299e5e20cd9b6d900de8559248"><div class="ttname"><a href="classfabgl_1_1_collision_detector_aefc081299e5e20cd9b6d900de8559248.html#aefc081299e5e20cd9b6d900de8559248">fabgl::CollisionDetector::removeSprite</a></div><div class="ttdeci">void removeSprite(Sprite *sprite)</div><div class="ttdoc">Removes the specified sprite from collision detector.</div><div class="ttdef"><b>Definition:</b> <a href="collisiondetector_8cpp_source.html#l00415">collisiondetector.cpp:415</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd_html_af49934327173c9c132ad03a49cbe88dd"><div class="ttname"><a href="classfabgl_1_1_collision_detector_af49934327173c9c132ad03a49cbe88dd.html#af49934327173c9c132ad03a49cbe88dd">fabgl::CollisionDetector::detectCollision</a></div><div class="ttdeci">Sprite * detectCollision(Sprite *sprite, bool removeCollidingSprites=true)</div><div class="ttdoc">Detects first collision with the specified sprite.</div><div class="ttdef"><b>Definition:</b> <a href="collisiondetector_8cpp_source.html#l00430">collisiondetector.cpp:430</a></div></div>
<div class="ttc" id="acollisiondetector_8h_html"><div class="ttname"><a href="collisiondetector_8h.html">collisiondetector.h</a></div><div class="ttdoc">This file contains fabgl::CollisionDetector class definition.</div></div>
<div class="ttc" id="adisplaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4_html_a2474a5474cbff19523a51eb1de01cda4"><div class="ttname"><a href="displaycontroller_8h_a2474a5474cbff19523a51eb1de01cda4.html#a2474a5474cbff19523a51eb1de01cda4">width</a></div><div class="ttdeci">uint8_t width</div><div class="ttdef"><b>Definition:</b> <a href="displaycontroller_8h_source.html#l00002">displaycontroller.h:2</a></div></div>
<div class="ttc" id="adisplaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534_html_ad12fc34ce789bce6c8a05d8a17138534"><div class="ttname"><a href="displaycontroller_8h_ad12fc34ce789bce6c8a05d8a17138534.html#ad12fc34ce789bce6c8a05d8a17138534">height</a></div><div class="ttdeci">uint8_t height</div><div class="ttdef"><b>Definition:</b> <a href="displaycontroller_8h_source.html#l00003">displaycontroller.h:3</a></div></div>
<div class="ttc" id="afabutils_8h_html"><div class="ttname"><a href="fabutils_8h.html">fabutils.h</a></div><div class="ttdoc">This file contains some utility classes and functions.</div></div>
<div class="ttc" id="agroup___enumerations_gafe919d7a7aeba256337f0fc494cf7221_html_ggafe919d7a7aeba256337f0fc494cf7221ab24d28cf12130dc2957866674bc65ff7"><div class="ttname"><a href="group___enumerations_gafe919d7a7aeba256337f0fc494cf7221.html#ggafe919d7a7aeba256337f0fc494cf7221ab24d28cf12130dc2957866674bc65ff7">fabgl::PixelFormat::RGBA2222</a></div><div class="ttdeci">@ RGBA2222</div></div>
<div class="ttc" id="astructfabgl_1_1_sprite_html"><div class="ttname"><a href="structfabgl_1_1_sprite.html">fabgl::Sprite</a></div><div class="ttdoc">Represents a sprite.</div><div class="ttdef"><b>Definition:</b> <a href="displaycontroller_8h_source.html#l00546">displaycontroller.h:546</a></div></div>
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